I dropped my iphone 4 in water what should i do?

I dropped it in the toilet by accident don't laugh at me.
I dried it off with a towel and had a heart attack.
The ringer is working but the up and down buttons for the sound are not which is weird. I tried to play music but no sound came out. Sound comes out for texts/ringer though! Volume on videos do not work.
I have my phone in a bowl of dry rice now! Help? Anything else i can do? Why does the sound not work for videos and music but work for the ringer?

Added (1). Please ANSWER!

Added (2). I tried plugging in earbuds as well and no sound came out, the little bar with the circle you can slide up and down to change the volume wasn't there.

They come from different speakers. Keep it in rice for one day don't take it out to early! If you do this it should be fine.